package com.iceframework.core.utils;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
 * 上传文件工具类
 * @author Palo
 *
 */
public class UploadUtils {

	public final static String separator = "/";
	public final static String split = "_";

	protected final Log log = LogFactory.getLog(getClass());

	class FilenameFilterImpl implements FilenameFilter {
		private String filter = ".";

		public FilenameFilterImpl(String aFilter) {
			filter = aFilter;
		}

		public boolean accept(File dir, String name) {
			return name.startsWith(filter);
		}
	};

	/**
	 * 获得当前的文件路径（通过当前日期生成）
	 * 
	 * @param basePath
	 * @return
	 */
	public static String getNowFilePath(String basePath) {
		SimpleDateFormat formater = new SimpleDateFormat("yyyy-MM-dd");
		String pathName = formater.format(new Date());
		File dir = new File(basePath + separator + pathName);
		if (!dir.exists())
			dir.mkdir();
		return pathName;
	}

	public static String getNewFileName(String oldFileName) {
		oldFileName = oldFileName.replaceAll("'", "").replaceAll("\"", "");
		Calendar date = Calendar.getInstance();
		int hour = date.get(Calendar.HOUR_OF_DAY);
		int minute = date.get(Calendar.MINUTE);
		int second = date.get(Calendar.SECOND);
		if (oldFileName.length() > 30)
			oldFileName = oldFileName.substring(oldFileName.length() - 30);
		return (new Integer(hour * 3600 + minute * 60 + second).toString()) + split + oldFileName;
	}

	public static String getThumbFileName(String fileName) {
		int pos = fileName.lastIndexOf(".");
		if (pos >= 0)
			return fileName.substring(0, pos) + "s" + fileName.substring(pos);
		else
			return fileName + "s";
	}

	/**
	 * This method checks if the given file exists on disk. If it does it's
	 * ignored because that means that the file is allready cached on the
	 * server. If not we dump the text on it.
	 */
	public void dumpAttributeToFile(String attributeValue, String fileName, String filePath) throws Exception {
		File outputFile = new File(filePath + separator + fileName);
		PrintWriter pw = new PrintWriter(new FileWriter(outputFile));
		pw.println(attributeValue);
		pw.close();
	}

	/**
	 * 保存文件 This method checks if the given file exists on disk. If it does it's
	 * ignored because that means that the file is allready cached on the
	 * server. If not we take out the stream from the digitalAsset-object and
	 * dumps it.
	 */
	public void dumpAsset(File file, String fileName, String filePath) throws Exception {
		long timer = System.currentTimeMillis();

		File outputFile = new File(filePath + separator + fileName);
		if (outputFile.exists()) {
			log.info("The file allready exists so we don't need to dump it again..");
			return;
		}

		FileOutputStream fis = new FileOutputStream(outputFile);
		BufferedOutputStream bos = new BufferedOutputStream(fis);

		BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));

		int character;
		while ((character = bis.read()) != -1) {
			bos.write(character);
		}
		bos.flush();

		bis.close();
		fis.close();
		bos.close();
		log.info("Time for dumping file " + fileName + ":" + (System.currentTimeMillis() - timer));
	}

	/**
	 * 保存缩略图 This method checks if the given file exists on disk. If it does
	 * it's ignored because that means that the file is allready cached on the
	 * server. If not we take out the stream from the digitalAsset-object and
	 * dumps a thumbnail to it.
	 */

	public void dumpAssetThumbnail(File file, String fileName, String thumbnailFile, String filePath, int width,
			int height, int quality) throws Exception {
		long timer = System.currentTimeMillis();
		log.info("fileName:" + fileName);
		log.info("thumbnailFile:" + thumbnailFile);

		File outputFile = new File(filePath + separator + thumbnailFile);
		if (outputFile.exists()) {
			log.info("The file allready exists so we don't need to dump it again..");
			return;
		}

		ThumbnailGeneratorUtils tg = new ThumbnailGeneratorUtils();
		tg.transform(filePath + separator + fileName, filePath + separator + thumbnailFile, width, height, quality);

		log.info("Time for dumping file " + fileName + ":" + (System.currentTimeMillis() - timer));
	}

	/**
	 * This method removes all images in the digitalAsset directory which
	 * belongs to a certain digital asset.
	 */
	public void deleteDigitalAssets(String filePath, String filePrefix) throws Exception {
		try {
			File assetDirectory = new File(filePath);
			File[] files = assetDirectory.listFiles(new FilenameFilterImpl(filePrefix));
			for (int i = 0; i < files.length; i++) {
				File file = files[i];
				log.info("Deleting file " + file.getPath());
				file.delete();
			}
		} catch (Exception e) {
			log.error("Could not delete the assets for the digitalAsset " + filePrefix + ":" + e.getMessage(), e);
		}
	}

}
